The preparation of O-alkyl carbonochloridothioates (2) was improved by performing the reaction of thiophosgene with potassium alkoxides in the corresponding alcohol or in tetrahydrofuran at - 65°C for 1 hour. In all cases, the reaction yielded products 2, O,O-dialkyl carbonothioates (4), and dialkyl carbonates (5) in varying distribution.
Reaction of Organic Tin(II) Compound with Phenyl Isothiocyanate and Carbon Disulfide
作者:Ikuko Wakeshima、Yoshihiro Saitoh、Ichiro Kijima
DOI:10.1246/bcsj.51.3549
日期:1978.12
bis[2-(dimethylamino)ethoxo]tin(II) to yield the 1 : 1 addition product. In the reaction with bis(2-methylphenoxo)tin(II), a compound containing one molecule of phenyl isothiocyanate per two molecules of the tin(II) compound was isolated, but the reaction with di(phenoxo)tin(II) did not occur. Di(ethoxo)tin(II) reacted with carbon disulfide to give diethyl thiocarbonate, diethyl carbonate, and tetraethyl orthocarbonate
已经研究了有机锡 (II) 化合物 Sn(OR)2[R=C2H5, CH2CH2N(CH3)2, C6H5, o- C6H4] 与异硫氰酸苯酯和二硫化碳的反应。二(乙氧基)锡(II)与异硫氰酸苯酯在苯中在室温下反应得到相应的加成产物。然而,在 80–81 °C 下的反应生成了 N-苯基碳亚胺酸二乙酯。异硫氰酸苯酯与双[2-(二甲氨基)乙氧基]锡(II)放热反应以产生1:1的加成产物。在与双(2-甲基苯氧基)锡(II)反应中,每两分子锡(II)化合物中分离出一分子异硫氰酸苯酯,但与二(苯氧基)锡(II)反应未分离出发生。二(乙氧基)锡(II)与二硫化碳反应生成硫代碳酸二乙酯、碳酸二乙酯和原碳酸四乙酯。
A General Synthesis of Phosphorus‐ and Arsenic‐Containing Analogues of the Thio‐ and Seleno‐cyanate Anions
作者:Frank Tambornino、Alexander Hinz、Ralf Köppe、Jose M. Goicoechea
DOI:10.1002/anie.201805348
日期:2018.7.2
general synthetic protocol for the synthesis of phosphorus‐ and arsenic‐containing analogues of the thio‐ and seleno‐cyanate anions is reported. This procedure allows for the isolation of three unprecedented species: the phosphaethynselenolate, PCSe− (1), the arsaethynthiolate, AsCS− (2), and the arsaethynselenolate, AsCSe− (3), anions. The structures, electronic properties, and spectroscopic signatures
Processes for producing 4-substituted benzopyran derivatives
申请人:CHUGAI SEIYAKU KABUSHIKI KAISHA
公开号:US20030065189A1
公开(公告)日:2003-04-03
Starting, for example, from 1-fluoro-2-fluoromethyl-3-butyn-2-yl 4-trifluoromethylphenyl ether, N-(2-cyanoethyl)-5-fluoro-4-fluoromethyl-4-(4-trifluoromethylphenoxy)-2-pentynamide is produced and then cyclized to synthesize 2,2-bis(fluoromethyl)-N-(2-cyanoethyl)-6-trifluoromethyl-2H-1-benzopyran-4-carboxamide. The invention processes for producing 4-substituted benzopyran derivatives involve fewer steps, feature greater safety and allow for easier purification than the prior art processes.
Processes for the preparation of 4-substituted benzopyran derivatives
申请人:Chugai Seiyaku Kabushiki Kaisha
公开号:US06455708B1
公开(公告)日:2002-09-24
Starting, for example, from 1-fluoro-2-fluoromethyl-3-butyn-2-yl 4-trifluoromethylphenyl; ether, N-(2-cyanoethyl)-5-fluoro-4-fluoromethyl-4-(4-trifluoromethylphenoxy)-2-pentynamide is produced and then cyclized to synthesize 2,2-bis(fluoromethyl)-N-(2-cyanoethyl)-6-trifluoromethyl-2H-1-benzopyran-4-carboxamide. The invention processes for producing 4-substituted benzopyran derivatives involve fewer steps, feature greater safety and allow for easier purification than the prior art processes.